specify full prefix of http
    
    because if we pass just http:/
    mock will fail with
    Traceback (most recent call last):
      File "/usr/bin/mockchain", line 336, in <module>
        main(sys.argv)
      File "/usr/bin/mockchain", line 235, in main
        res, msg =  add_local_repo(my_mock_config, my_mock_config, baseurl)
      File "/usr/bin/mockchain", line 95, in add_local_repo
        repoid=baseurl.split('//')[1].replace('/','_')
    IndexError: list index out of range